, your vote. one-on-one, the candidates debate. now reporting from abc news election headquarters in new york, diane sawyer and george stephanopoulos. >> and good evening. this is it, the biggest night in the ration for the white house 2012. and we are so glad you are joining us, as the presidential gladiators get ready to walk into a big arena. there's the stage. president barack obama, governor mitt romney are standing by in the wings right now and jofgeor it is hard to imagine the pressure on them. as many of 60 million of us could be watching tonight. >> first of three debates. and the first debates almost always help the challenger. mitt romney needs it. it's a tight race, he's behind. >> and tonight, to cover it all, our team, inside the debate hall. and keeping watch in our fact check desk, and also, with us right here in the studio, the insiders from both parties, ready to weigh in on who woman and the big moments we'll remember tomorrow. >> the moderator tonight, jim lehrer from pbs. he's moderated 12 debates, more than anybody else. here he is right now. >> good evening, from t